In bad rodent infestations, most anti-coagulant rodenticides will have an impact on reducing the rodent population starting in 4 to 5 days. However, due to the high levels of palatability, internal tests have shown excellent results compared to competing products. So, it is perfect for heavy rodent infestations, but it is also great for those accounts that have lingering rodents, despite practicing good rodent control. Due to its product characteristics, hot climates may also benefit from this product. It would also be good as your everyday bait, but we recommend that you monitor the bait locations on regular intervals. To summarize, use FirstStrike when you really need your rodenticide to work.